2145239622 has 48 divisors (see below), whose sum is σ = 4942192320. Its totient is φ = 670177536.

The previous prime is 2145239563. The next prime is 2145239623. The reversal of 2145239622 is 2269325412.

2145239622 is a `hidden beast` number, since 2 + 1 + 4 + 5 + 23 + 9 + 622 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145239623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58468 + ... + 87800.

It is an arithmetic number, because the mean of its divisors is an integer number (102962340).

Almost surely, 2^2145239622 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2145239622, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2471096160).

2145239622 is an abundant number, since it is smaller than the sum of its proper divisors (2796952698).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2145239622 is a wasteful number, since it uses less digits than its factorization.

2145239622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29597 (or 29594 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 2145239622 is about 46316.7315556700. The cubic root of 2145239622 is about 1289.7096119396.

The spelling of 2145239622 in words is "two billion, one hundred forty-five million, two hundred thirty-nine thousand, six hundred twenty-two".